/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.iotdb.db.queryengine.plan.relational.planner.assertions;

import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.SymbolReference;

import static java.util.Objects.requireNonNull;

public class MatchResult {
  public static final MatchResult NO_MATCH = new MatchResult(false, new SymbolAliases());

  private final boolean matches;
  private final SymbolAliases newAliases;

  public static MatchResult match() {
    return new MatchResult(true, new SymbolAliases());
  }

  public static MatchResult match(String alias, SymbolReference symbolReference) {
    SymbolAliases newAliases = SymbolAliases.builder().put(alias, symbolReference).build();
    return new MatchResult(true, newAliases);
  }

  public static MatchResult match(SymbolAliases newAliases) {
    return new MatchResult(true, newAliases);
  }

  public MatchResult(boolean matches) {
    this(matches, new SymbolAliases());
  }

  private MatchResult(boolean matches, SymbolAliases newAliases) {
    this.matches = matches;
    this.newAliases = requireNonNull(newAliases, "newAliases is null");
  }

  public boolean isMatch() {
    return matches;
  }

  public SymbolAliases getAliases() {
    return newAliases;
  }

  @Override
  public String toString() {
    if (matches) {
      return "MATCH";
    }
    return "NO MATCH";
  }
}
